class play:
    def blast(self):
        pass
    def iem(self):
        pass
    def major(self):
        pass
class G2_play(play):
    def blast(self):
        print('G2正在参加blast')
    def iem(self):
        print('G2正在参加IEM')
    def major(self):
        print('G2正在参加major')
g2 = G2_play()
g2.blast()